<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="dragable" style="left: 0;top: 0;width: 100px;height: 100px;border: solid 1px green;">
    </div>
</body>

<script>
    function enableDrag(element) {
        let x0, y0
        let ex = 0, ey = 0
        let move = e => {
            let [dx, dy] = [e.clientX - x0, e.clientY - y0]
            console.log(dx, dy);
            element.style.transform = `translate(${ex + dx}px,${ey + dy}px)`
        }
        let up = e => {
            document.removeEventListener('mousemove', move)
            document.removeEventListener('mouseup', up)
            let [dx, dy] = [e.clientX - x0, e.clientY - y0]
            element.style.transform = `translate(${ex + dx}px,${ey + dy}px)`
            ex += dx, ey += dy
        }
        element.addEventListener('mousedown', e => {
            [x0, y0] = [e.clientX, e.clientY]
            document.addEventListener('mousemove', move)
            document.addEventListener('mouseup', up)
        })

    }
    enableDrag(document.getElementById('dragable'))
</script>

</html>